I removed the wall plate and inspected it. See a small spark coming from inside a switch when you turn it. Light switch loud popping noise. I recently installed a new switch and noticed that if the switch is turned on or off slow, there is crackling sound rom the switch and then a smell of the electrical contact.
My light switch makes a popping sound when turned on slowly. It doesn't matter how quickly or slowly I turn on the equipment. The switch will need to be replaced. Clear out anything from under your desk. Breaker popping when switch is turned on or. Like rather than popping, it makes radio static type noise when turning the fan off if I move the switch really slow. Normal small ballist fluorescent lights. Does the amperage rating on the switch have anything to do with it. Thicken and slowly become scarred over time.